Predicted to enable peptidyl-prolyl cis-trans isomerase activity. Predicted to be involved in protein folding. Predicted to act upstream of or within protein peptidyl-prolyl isomerization. Predicted to be located in nucleus. Predicted to be part of U2-type precatalytic spliceosome and catalytic step 2 spliceosome. Orthologous to human CWC27 (CWC27 spliceosome associated cyclophilin).